Solar MCB

The LDB9-63 series miniature circuit breaker is designed for overload and short-circuit protection in AC and DC low-voltage distribution systems. It is suitable for lighting distribution, motor distribution, photovoltaic protection, energy storage cabinets, grid-side auxiliary circuits, and industrial control panels.

The product can also disconnect electrical equipment and lighting circuits infrequently under normal conditions. With compact modular construction, 1P to 4P configurations, clear on-off indication, and 6kA breaking capacity, it provides practical protection for both solar power projects and general electrical distribution.

• AC and DC compatibility: Supports AC 230V/400V systems and DC circuits up to 1000V depending on pole configuration.
• Photovoltaic-ready protection: Suitable for PV arrays, combiner boxes, battery systems, and energy storage distribution circuits.
• Multiple pole options: Available in 1P, 2P, 3P, and 4P configurations for different wiring and voltage requirements.
• Rated current range: 1A-63A coverage for lighting, control, small motor, and renewable energy circuits.
• Reliable breaking performance: Ultimate and operating short-circuit breaking capacity rated at 6kA.
• Flexible tripping curves: AC models support C curve and D curve; DC models support B, C, and D instantaneous trip types.
• Long service life: Mechanical endurance up to 20,000 cycles and electrical endurance up to 10,000 cycles.
• Convenient wiring: Wiring capacity up to 25mm2 with 3.0N*m tightening torque for secure terminal connection.

This breaker is recommended for circuits that require compact modular protection, reliable trip performance, and clear switching status.

• Photovoltaic distribution boxes and combiner circuits
• Energy storage systems and battery cabinets
• AC lighting distribution systems
• Motor distribution systems where D curve models are required
• Electrical grid auxiliary power circuits
• Industrial control and automation panels
• Residential, commercial, and renewable energy distribution boards

• Ambient temperature: -5°C to +40°C; the 24-hour average should not exceed 35°C.
• Installation altitude: not more than 2000m.
• Protection level: IP20, suitable for installation inside an appropriate enclosure.
• Select the trip curve according to load characteristics, startup current, and protection coordination.
• Use the specified wiring capacity and tightening torque to ensure a secure electrical connection.

To select the correct model, confirm AC or DC system type, rated voltage, rated current, pole number, trip curve, breaking capacity, wiring size, and installation environment. For photovoltaic or battery applications, pay special attention to system voltage, polarity, series connection, and upstream protection coordination.

Send us your system voltage, current rating, pole configuration, trip curve, AC/DC requirement, and application scenario. Our team can recommend the proper LDB9-63 configuration for safe and efficient circuit protection.